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Finding the Fourth Proportional to 17,881.38, 26,821.26 and 5,400.90

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Solution

The fourth proportional to 17,881.38, 26,821.26 and 5,400.90 is: 8,101.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,881.38 : 26,821.26 = 5,400.90 : x
  2. Step 2: Convert to fraction form
    17,881.38/26,821.26 = 5,400.90/x
  3. Step 3: Cross multiply
    17,881.38x = 26,821.26 × 5,400.90
  4. Step 4: Simplify right side
    17,881.38x = 144,858,943.13
  5. Step 5: Solve for x
    x = 144,858,943.13/17,881.38
  6. Step 6: Final answer
    x = 8,101.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.